JP4301629B2 - Spinning machine with compression device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a spinning machine having a compression device for a sliver, wherein the compression device comprises a compression element having a guide surface to be moved, which is penetrated by a penetrating part, and a suction device. , Which is connected to the inside of the compression element so that air flows along a guide surface by a penetrating portion and reaches the inside of the compression element.
[0002]
[Prior art]
US-4,488,39 7 discloses such a compression device, in which case the sliver is guided through a guide surface on which the compression element is moved, in which case the guide surface exerts a pulling force on the sliver and laterally The air flowing from the sliver to the sliver and sucked into the guide surface applies the protruding edge fibers of the sliver to the sliver. Furthermore, such a compression element prevents the sliver or yarn twisting from being loosened downstream of the compression element when a twisting device is connected behind it. Such a compression device is advantageously provided between the drafting device and the ring spinning device in the spinning machine, in which case the compression element can be a drawing roll of the drafting device cooperating with the crimping roll. In the case of the aforementioned US patent, the compression element is arranged behind the drafting device.
[0003]
It has been found that the pulling force exerted on the sliver by the compression element is not sufficient to fully guide the sliver under all conditions.
[0004]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to improve the compression device so that the sliver is sufficiently guided.
[0005]
[Means for Solving the Problems]
In order to solve this problem, in the configuration of the present invention, the roughness of the guide surface to be moved is significantly increased in the direction of movement of the guide surface, whereas it is increased in the direction transverse to the direction of motion. I tried not to.
[0006]
【The invention's effect】
Thus, the basic technical idea of the present invention is that the roughness of the guide surface to be moved is remarkably increased in the direction of movement of the guide surface, whereas it remains slightly in the direction transverse to the direction of movement. As a matter of course, this improves the guiding action of the fibers and does not reduce the lateral movement of the fibers.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Increasing the roughness in the direction of travel of the sliver is preferably achieved by fluting (grooves in the longitudinal direction of the column body), ie by grooves in the guide surface transverse to the direction of sliver travel. Achieved. For example, in the case of a drum-shaped compression element, the fluting can be formed parallel to the axis or oblique to the axis. The use of arrow fluting is also conceivable. By increasing the roughness, or by fluting, especially when the compression element acts in cooperation with the roll against which the compression element is crimped and a significant clamping force is exerted on the fiber between the compression element and the roll, The effect of guiding the fibers is improved. The improved clamping or guiding action is clearly produced for all types of fibers.
[0008]
The spinning machine is equipped with a compression device for the sliver, which consists of a compression element having a guide surface to be moved, which is pierced by the penetrating part, and a suction device, the suction device being a compression device. It is connected to the inside of the element, and air flows along the guide surface by the penetrating portion so as to reach the inside of the compression element. As described above, according to the present invention, the roughness of the guide surface to be moved is remarkably increased in the direction of movement of the guide surface, but is not increased in the direction transverse to the direction of movement. However, the guide surface to be moved is provided with protrusions and grooves, and these protrusions and grooves extend laterally or obliquely with respect to the direction of movement of the guide surface. be able to.
[0009]
The guide surface can have a number of holes in the direction of travel of the sliver or the direction of movement of the guide surface.
[0010]
It is also advantageous if a large number of holes are arranged side by side in the direction transverse to the running direction of the sliver or the direction of movement of the guide surface.
[0011]
Advantageously, every other hole is located at the bottom of the groove when viewed in the direction of travel of the sliver or the direction of movement of the guide surface.
[0012]
The penetration is advantageously configured as a circle with a diameter between 0.7 mm and 1.3 mm, partially with a width between 0.8 mm and 1.2 mm and 0.3 mm and 0.3 mm. Located in a groove having a depth of between 8 mm.
[0013]
In order to obtain a good compression result, it is important that the penetrating part is partially located in the protrusion and partly in the groove.
[0014]
The compression element is preferably configured as an outlet roll of a drafting device, behind which a twisting device is arranged. The flank of the protrusion or the side wall of the groove is formed as steep as possible, that is, at an angle of up to 10 ° with respect to a perpendicular standing on the surface of the compression element for guiding the sliver. This ensures that the outer peripheral surface of the compression element leading the fibers is interrupted as uniformly as possible, which results in a draft without sliver support.
[0015]
【Example】
The present invention will be described in detail below on the basis of one embodiment shown in the drawings.
[0016]
The compression element V shown in FIG. 1 is configured as a drum, and a sliver F travels in the circumferential direction of the compression element V on its surface. The compression element V has two travel lanes for the sliver, in which case two moved guide surfaces VF with penetrations or holes VB are located side by side. The sliver F contacts the compression element V over a winding angle of at least 90 °. Air is sucked into the inside of the compression element through the hole VB, whereby the edge fiber RF is applied to the sliver F as shown in FIG. 3 and is well incorporated into the sliver during subsequent twisting. The holes VB have a diameter D between 0.7 mm and 1.2 mm and are located next to each other with a mutual spacing between 1.0 mm and 1.5 mm. They are shifted from each other in the circumferential direction L. The grooves VN or the protrusions VO extend in the transverse direction with respect to the running direction L of the sliver F. At this time, the holes VB of every other hole row extending substantially in the direction of the axis A are located at the bottom of the groove. The groove has a groove width b between 0.8 mm and 1.2 mm and is rounded at the bottom. The bottom roundness u shown in FIG. 2 is preferably 0.2 mm and the groove depth t is less than 1 mm. The radius of curvature r of the guide surface VF to be moved is between 50 mm and 90 mm.
[0017]
As can be seen from FIG. 1, the guide surface VF to which the compression element V is moved is attached to a hub N, by which the compression element V is fixed to the shaft or the barrel of the drafting device.
[0018]
The protrusion VO and the groove VN of the compression element V extend in a direction transverse to the direction of movement L of the guide surface VF or at a specified angle. The structure of the guide surface VF with the projections VO and the grooves VN can be called fluting, in which case the contour of the fluting can be formed by rolling or preferably drawing. In particular, the flank of the protrusion VO is made as steep as possible as shown in FIG. In FIG. 4, the inclination of the flank of the protrusion VO with respect to the radial ray of the compression element is indicated by an angle a, this angle being at most 8 °, preferably less than 3 °, in particular 0 °. is there. The steep angle ensures that the width b of the groove VN or the extension of the projection VO in the direction of movement L of the guide surface VF is as constant as possible, which allows a uniform draft of the sliver F. .
[0019]
In conclusion, the protrusions and grooves of the guide surface VF are as follows: the flank inclination of the protrusions is at least partly transverse to or substantially transverse to the direction of movement of the guide surface VF. Form.
[Brief description of the drawings]
FIG. 1 is a meridian cross-sectional view of a compression element.
FIG. 2 is a partial sectional view transverse to the axis of the compression element.
FIG. 3 is an enlarged plan view of a guide surface of the compression element.
4 is a side view of the protrusion as part of FIG. 2 in which the flank of the protrusion VO has an angle of inclination with respect to a radial ray from the center of the compression element.
[Explanation of symbols]
a angle, A axis, b groove width, D diameter, F sliver, L circumferential direction, N hub, r radius of curvature, RF edge fiber, t groove depth, u groove roundness, V compression element, VB penetration or Hole, VF guide surface, VN groove, VO protrusion

Claims (7)

A spinning machine having a compression device for compressing a sliver (F) , wherein the compression device has a driven guide surface (VF) penetrated by a penetration part (VB) and a suction device (V) This suction device is connected to the inside of the compression element (V), and the air flows along the guide surface (VF) by the penetrating part (VB), so that the inside of the compression element (V) The guide surface (VF) to be moved is transverse to the running direction of the sliver and transverse to the direction of movement (L) of the guide surface (VF). A spinning machine having a compression device, characterized in that it has a groove protrusion structure with grooves (VN) and protrusions (VO) arranged . Guide surface (VF) is the feature that it has through-section as multiple holes and (VB) in the sliver running direction (L) or guide surface (F) direction of motion of (VF) (L) The spinning machine according to claim 1 . Transversely to the direction of movement (L) of the sliver running direction (L) or guide surface (F) (VF), the penetration portion of the hole of the multiple (VB) is alongside one another form a hole column The spinning machine according to claim 1 or 2 , wherein the spinning machine is located. When viewed in the direction of travel (L) of the sliver (F) or the direction of motion (L) of the guide surface (VF) , every other row of holes with through-holes (VB) as a plurality of holes forms grooves (VN bottom or is characterized by being located in the protrusion (VO), the spinning machine according to claim 3, wherein the). Penetrating portion as a plurality of holes (VB) is, 0.7 mm and 1.3mm have been configured as a circle having a diameter of between, the width and 0.3mm between 0 .8Mm and 1.2mm in the groove (VN) having a depth of between 0.8 mm, on whether one collision in force (VO), and being located, any one of claims 1 to 4 Spinning machine. The spinning machine according to any one of claims 1 to 5 , characterized in that the inclination of the projection (VO) with respect to the radial ray from the center of the compression element (V) of the flank is at most 8 ° . Groove projection structure of the guide surface (VF) is as follows, namely that flank inclined protrusion guide surface (VF) (VO) is a vertical with respect to the direction of movement (L) of the guide surface (VF) The spinning machine according to claim 6 , wherein the spinning machine is provided.

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